Size based sorting and patterning of microbeads by evaporation driven flow in a 3D micro-traps array.

Wong, Chee Chung; Liu, Yuxin; Wang, Karen Yanping; Rahman, Abdur Rub Abdur · Lab Chip · 2013

basic_science · Level V

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Abstract

We present a three-dimensional (3D) micro-traps array for size selective sorting and patterning of microbeads via evaporation-driven capillary flow. The interconnected micro-traps array was manufactured by silicon micromachining. Microliters of aqueous solution containing particle mixtures of different sized (0.2 to 20 μm diameter) beads were dispensed onto the micro-traps substrate. The smaller particles spontaneously wicked towards the periphery of the chip, while the larger beads were orderly docked within the micro-traps array.

Medical subject headings